Most of the time, in good light, I wish AlphaSmart had not put a backlight on Dana. The backlight is one factor that reduces the clarity of the display, because the polarizer is not purely reflective… it must be able to transmit light from the electroluminescent film behind the display. (Neo’s fully reflective display bounces a lot more ambient light back to your eyes.) The other factor contributing to Dana’s murkier display is the touch panel over the LCD. Palm OS is a stylus-driven OS, so the touchscreen is necessary, but it does hurt the visibility of the display.
Anyhow, sometimes the backlight is pretty useful, even if it brings battery life down. At night, sitting near a fire, for example.